3-7a=-(1+6a)

Solution for 3-7a=-(1+6a) equation:

Simplifying
3 + -7a = -1(1 + 6a)
3 + -7a = (1 * -1 + 6a * -1)
3 + -7a = (-1 + -6a)

Solving
3 + -7a = -1 + -6a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '6a' to each side of the equation.
3 + -7a + 6a = -1 + -6a + 6a

Combine like terms: -7a + 6a = -1a
3 + -1a = -1 + -6a + 6a

Combine like terms: -6a + 6a = 0
3 + -1a = -1 + 0
3 + -1a = -1

Add '-3' to each side of the equation.
3 + -3 + -1a = -1 + -3

Combine like terms: 3 + -3 = 0
0 + -1a = -1 + -3
-1a = -1 + -3

Combine like terms: -1 + -3 = -4
-1a = -4

Divide each side by '-1'.
a = 4

Simplifying
a = 4